1552355421 has 8 divisors (see below), whose sum is σ = 2070301824. Its totient is φ = 1034656320.

The previous prime is 1552355401. The next prime is 1552355507. The reversal of 1552355421 is 1245532551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1552355421 - 2²⁶ = 1485246557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1552355401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46645 + ... + 72666.

It is an arithmetic number, because the mean of its divisors is an integer number (258787728).

Almost surely, 2^1552355421 is an apocalyptic number.

It is an amenable number.

1552355421 is a deficient number, since it is larger than the sum of its proper divisors (517946403).

1552355421 is a wasteful number, since it uses less digits than its factorization.

1552355421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123651.

The product of its digits is 30000, while the sum is 33.

The square root of 1552355421 is about 39399.9418908201. The cubic root of 1552355421 is about 1157.8804490277.

Adding to 1552355421 its reverse (1245532551), we get a palindrome (2797887972).

The spelling of 1552355421 in words is "one billion, five hundred fifty-two million, three hundred fifty-five thousand, four hundred twenty-one".